netlink: 'syz.5.2001': attribute type 10 has an invalid length. ------------[ cut here ]------------ debug_locks && !(lock_is_held(&(&n->tbl->lock)->dep_map) != 0) WARNING: net/core/neighbour.c:154 at neigh_mark_dead+0x2fb/0x340 net/core/neighbour.c:154, CPU#1: syz.5.2001/11162 Modules linked in: CPU: 1 UID: 0 PID: 11162 Comm: syz.5.2001 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:neigh_mark_dead+0x2fb/0x340 net/core/neighbour.c:154 Code: e8 03 42 80 3c 28 00 74 08 48 89 df e8 ae d5 69 f8 4c 89 33 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 26 fd f7 f7 90 <0f> 0b 90 e9 8f fd ff ff 48 c7 c1 d0 47 bc 90 80 e1 07 80 c1 03 38 RSP: 0018:ffffc90004fbe580 EFLAGS: 00010287 RAX: ffffffff89d0b47a RBX: ffff88802a9d1000 RCX: 0000000000080000 RDX: ffffc9000f1ab000 RSI: 0000000000002c62 RDI: 0000000000002c63 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff520009f7ca8 R12: ffff88802a9d113c R13: dffffc0000000000 R14: ffff88802a9d1020 R15: ffff88802a9d1000 FS: 00007f5e8f1a46c0(0000) GS:ffff88812472e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000cfe0 CR3: 0000000076fec000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 000000000000293c DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: neigh_flush_one+0x27c/0x5a0 net/core/neighbour.c:388 neigh_flush_dev net/core/neighbour.c:432 [inline] __neigh_ifdown+0x1fb/0xc70 net/core/neighbour.c:465 neigh_ifdown+0x1f/0x30 net/core/neighbour.c:487 rt6_disable_ip+0x751/0x7e0 net/ipv6/route.c:5013 addrconf_ifdown+0x155/0x1ad0 net/ipv6/addrconf.c:3892 addrconf_notify+0x1bc/0x1050 net/ipv6/addrconf.c:-1 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:86 call_netdevice_notifiers_extack net/core/dev.c:2349 [inline] call_netdevice_notifiers net/core/dev.c:2363 [inline] __dev_notify_flags+0x2d9/0x510 net/core/dev.c:9934 netif_change_flags+0xde/0x1b0 net/core/dev.c:9961 do_setlink+0xdd6/0x47a0 net/core/rtnetlink.c:3284 rtnl_changelink net/core/rtnetlink.c:3932 [inline] __rtnl_newlink net/core/rtnetlink.c:4103 [inline] rtnl_newlink+0x15b0/0x1c30 net/core/rtnetlink.c:4242 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7159 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2572 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7bd/0x940 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x7c3/0xae0 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec+0x14e/0x190 net/socket.c:800 __sock_sendmsg net/socket.c:818 [inline] ____sys_sendmsg+0x54e/0x850 net/socket.c:2715 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2769 __sys_sendmsg net/socket.c:2801 [inline] __do_sys_sendmsg net/socket.c:2806 [inline] __se_sys_sendmsg net/socket.c:2804 [inline] __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2804 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5e8e39e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f5e8f1a4028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f5e8e625fa0 RCX: 00007f5e8e39e159 RDX: 0000000000000800 RSI: 0000200000000600 RDI: 0000000000000004 RBP: 00007f5e8e43506b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5e8e626038 R14: 00007f5e8e625fa0 R15: 00007ffdb39f08e8